A dataset provided by the European Space Agency

Name OT2_gstacey_6
Title PACS Oxygen Spectroscopy of High Velocity [CII] Outflows in PG1206+459


DOI https://doi.org/10.5270/esa-4swft1b
Author European Space Agency
Description We have discovered extreme velocity [CII] 158 um
line emission from the z = 1.2 hyper-luminous QSO
PG 1206+459. The [CII] line emission is
concentrated in twin lobes of emission roughly
centered on the CO emission but displaced
+/- 1500 km/s with respect to the CO line core.
The mass traced in the [CII] line is quite large
- about 5E9 M(solar) in each lobe or 13% of the
total molecular gas mass in the host galaxy. We
interpret this symmetric [CII] velocity structure
as an outflow, likely driven by the AGN. The
velocities of the [CII] lobes are larger than
the escape velocity, so much of this material
may leave the galaxy quenching both star
formation and AGN activity, and transforming it
into a red-and-dead passive galaxy. The CO
line profile also shows a broad and blueshifted
component that may represent an additional
molecular component to the outflow, although a
merger origin is also possible. In OT1 we were
awarded 2.9 hours of PACS spectroscopy (not yet
scheduled) to observe the [OI] 63 um, [OIII] 52
and 88 um, and [OIV] 26 um lines from the blue
component of the line. Here we ask for an
additional 10.2 hours of PACS time to widen our
spectral scan to enclose the newly discovered
(March 2011) red lobe and significantly improve
our detection limit over the entire velocity
range. These observations will be used to
constrain the physical conditions, ionization
structure, total mass, and radiative environment
of the outflowing material using extinction-free
probes. Our [CII] observations of PG1206 represent
the first time that massive outflows have been
detected in the [CII] line - a well established
tracer of photodissociated molecular gas. The
proposed Herschel observations will lay the
groundwork for future studies of molecular
outflows using [CII] and other ...far-IR lines in
the early universe that will soon be possible
with ALMA.
Instrument PACS_PacsRangeSpec_point
Temporal Coverage 2012-06-26T16:18:07Z/2012-07-09T00:23:55Z
Version SPG v14.2.0
Mission Description Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/h®erschel/
Date Published 2013-01-08T18:40:37Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013, Pacs Oxygen Spectroscopy Of High Velocity Square_Bracket_Openciisquare_Bracket_Close Outflows In Pg1206+459, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-4swft1b